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beta-decay rate of Fe-59 in shell burning environment and its influence on the production of Fe-60 in a massive star
KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.ORCID-id: 0000-0002-1406-5695
Vise andre og tillknytning
2016 (engelsk)Inngår i: Physical Review C - Nuclear Physics, ISSN 2469-9985, Vol. 94, nr 6, artikkel-id 065807Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We deduced the stellar beta-decay rate of Fe-59 at typical carbon-shell burning temperature by taking the experimental Gamow-Teller transition strengths of the Fe-59 excited states. The result is also compared with those derived from large-scale shell model calculations. The new rate is up to a factor of 2.5 lower than the theoretical rate of Fuller, Fowler, and Newman (FFN) and up to a factor of 5 higher than decay rate of Langanke and Martinez-Pinedo (LMP) in the temperature region 0.5 <= T <= 2 GK. We estimated the impact of the newly determined rate on the synthesis of cosmic gamma emitter Fe-60 in C-shell burning and explosive C/Ne burning using a one-zone model calculation. Our results show that Fe-59 stellar beta decay plays an important role in Fe-60 nucleosynthesis, even though the uncertainty of the decay rate is rather large due to the error of B(GT) strengths.

sted, utgiver, år, opplag, sider
American Physical Society, 2016. Vol. 94, nr 6, artikkel-id 065807
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Identifikatorer
URN: urn:nbn:se:kth:diva-200407DOI: 10.1103/PhysRevC.94.065807ISI: 000391015800005Scopus ID: 2-s2.0-85007482788OAI: oai:DiVA.org:kth-200407DiVA, id: diva2:1069763
Forskningsfinansiär
Swedish Research Council, 621-2012-3805 621-2013-4323
Merknad

QC 20170130

Tilgjengelig fra: 2017-01-30 Laget: 2017-01-27 Sist oppdatert: 2017-01-30bibliografisk kontrollert

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